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| Number | Title | Issue Date |
| 7607098 | System and method for dynamically controlling operation of rheometric instruments System and methods are described for dynamically controlling operation of a rheometer. A program is created on a programming interface for executing a test upon a sample in a rheometer by receiving user selections of a plurality of nodes and connections of each node... | 10/20/2009 |
| 7594429 | System and method for improved optical measurements during rheometric measurements A rheometric system includes an optical encoder coupled to a rotating shaft and configured to detect a rotational position of the shaft with respect to a reference. The rotational information is forwarded to a program or memory. An optical rotation plate is mechanic... | 09/29/2009 |
| 7578613 | Modulated differential scanning calorimeter solvent loss calibration apparatus and method A modulated differential scanning calorimeter that accounts for heat flow due to evaporative solvent loss. The calorimeter modulates the temperature applied to a sample and a reference to determine the amount of heat flow that is due to evaporation. By calculating t... | 08/25/2009 |
| 7566167 | System and method for a thermogravimetric analyzer having improved dynamic weight baseline Systems and methods for minimizing extraneous forces and calculating corrected weights of samples based on buoyancy factors for a thermogravimetric analyzer (TGA). The TGA includes a balance chamber and a furnace configured to heat a sample. A null balance is provid... | 07/28/2009 |
| 7564027 | Adsorption, detection and identification of components of ambient air with desorption/ionization on silicon mass spectrometry (DIOS-MS) The present invention provides a device, system, and associated methods to actively or passively sample air by directing it onto the surface of a porous light-absorbing semiconductor, for example, a desorption/ionization on porous silicon (“DIOS”) chip. Upon ads... | 07/21/2009 |
| 7537018 | Method and apparatus for controlling partial vapor pressure in a sorption analyzer An embodiment of the present invention is a method for creating and maintaining a partial vapor pressure in a sample chamber of a sorption analyzer. A first dry gas flow is purged from a first mass flow controller through a saturator to produce a near-saturated gas ... | 05/26/2009 |
| 7526941 | Rheometer torque calibration fixture A method of calibrating the torque outputs of a rheometer by using a calibrating object with a certified moment of inertia, measuring the moment of inertia of the calibrating object using the rheometer, and calculating the torque adjustment factor by dividing the ce... | 05/05/2009 |
| 7504076 | Apparatus and methods for performing parallel processes Embodiments of the present invention are directed to an apparatus and method for performing parallel processes. One embodiment of the present invention is directed to an apparatus for performing a process having a plurality of steps in which each step is performed i... | 03/17/2009 |
| 7500385 | System for in-situ optical measurement and sample heating during rheometric measurements An optical rheometer system includes a rheometer chamber that can retain a fluid sample to be measured. A light source is provided that creates a light beam incident on the fluid sample. A Peltier heating plate is provided that has a channel region located within th... | 03/10/2009 |
| 7470057 | Differential scanning calorimeter sensor and method A sensor for a heat flux differential scanning calorimeter in which the differential temperatures are measured between locations external to the regions of heat exchange between the sensor and sample containers. The measured differential temperatures respond to the ... | 12/30/2008 |
| 7442299 | Ion exchange porous resins for solid phase extraction and chromatography Embodiments of the present invention are directed to porous resins for solid phase extractions. The resins feature at least one hydrophobic component, at least one hydrophilic component and at least one ion exchange functional group. The resins exhibit superior wett... | 10/28/2008 |
| 7416328 | System and method for a thermogravimetric analyzer having improved dynamic weight baseline Systems and methods for minimizing extraneous forces and calculating corrected weights of samples based on buoyancy factors for a thermogravimetric analyzer (TGA). The TGA includes a balance chamber and a furnace configured to heat a sample. A null balance is provid... | 08/26/2008 |
| 7399410 | Chromatographic column and methods for controlling sorbent density Disclosed herein are apparatus and methods for mitigating column bed compression over time. This invention provides for an improved column design and method of controlling bed density in a chromatographic column using a protruding portion of a filter assembly. The i... | 07/15/2008 |
| 7396469 | Backflow prevention for high pressure gradient systems Gradient performance with high pressure gradient solvent delivery system is optimized by approximation of infinite stroke volume of high pressure pumps by the addition of pulse dampening with backflow prevention to each high pressure pump. The backflow prevention ad... | 07/08/2008 |
| 7366704 | System and method for deconvoluting the effect of topography on scanning probe microscopy measurements A method for using a neural network to deconvolute the effects due to surface topography from the effects due to the other physical property being measured in a scanning probe microscopy (SPM) or atomic force microscopy (AFM) image. In the case of a thermal SPM, the... | 04/29/2008 |
| 7362429 | Opaque additive to block stray light in amorphous fluoropolymer light-guiding flowcells The present invention is directed to the use of a light absorbing wall material to eliminate stray light paths in light-guiding structures, such as those used for HPLC absorbance detection. More specifically, the present invention relates to the use of carbon-doped ... | 04/22/2008 |
| 7356995 | Peltier based freeze-thaw valves and methods of use A freeze-thaw valve is provided using a Peltier heat pump where the thermal short-circuit path between a cooled thermal mass and a heated thermal mass is reduced or absent and the valve state transition time is minimized. The freeze-thaw valve comprises a Peltier he... | 04/15/2008 |
| 7332087 | Flow sensing apparatus used to monitor/provide feedback to a split flow pumping system A method and apparatus for monitoring and controlling the nano-scale flow rate of fluid in the operating flow path of a HPLC system without relying on a nano-scale sensor in the operating flow path. A main flow sensor is disposed in the main flow path between the pu... | 02/19/2008 |
| 7311502 | Method for using a hydraulic amplifier pump in ultrahigh pressure liquid chromatography A method for supplying solvent to an ultra-high pressure liquid chromatography system using a hydraulic amplifier. The hydraulic amplifier system includes a hydraulic cylinder comprising a primary piston chamber in which a primary piston is disposed and a secondary ... | 12/25/2007 |
| 7308908 | Device and method for controlling the flow of fluid in a conduit The present invention provides devices and methods for controlling the flow of fluids in very high pressure situations. The devices feature valve shafts having bearings and pins to hold stator surfaces and rotor surfaces in proper alignment. ... | 12/18/2007 |
| 7306365 | Differential scanning calorimeter accounting for heat leakage A method and system for calculating a heat flow to a sample in a differential scanning calorimeter (DSC). The DSC has a sensor within an enclosure comprising an absolute temperature measurement detector for measuring the temperature of a base position on the sensor,... | 12/11/2007 |
| 7250214 | Porous inorganic/organic hybrid monolith materials for chromatographic separations and process for their preparation Novel materials for chromatographic separations, processes for their preparation, and separation devices containing the chromatographic materials. In particular, the novel materials are porous inorganic/organic hybrid monolith materials, which desirably may be surfa... | 07/31/2007 |
| 7232520 | Ion exchange porous resins for solid phase extraction and chromatography Embodiments of the present invention are directed to porous resins for solid phase extractions. The resins feature at least one hydrophobic component, at least one hydrophilic component and at least one ion exchange functional group. The resins exhibit superior wett... | 06/19/2007 |
| 7229539 | Destructible surfactants and uses thereof Destructible surfactants and methods of using same are provided. The invention includes anionic surfactants having a dioxolane or dioxane functional group which enables the surfactant to be broken down under acidic conditions. The invention also includes methods of ... | 06/12/2007 |
| 7223473 | Porous inorganic/organic hybrid particles for chromatographic separations and process for their preparation Novel material for chromatographic separations, processes for its preparation, and separations devices containing the chromatographic material. In particular, the disclosure describes porous inorganic/organic hybrid particles having a chromatographically-enhancing p... | 05/29/2007 |
| 7192525 | Device for solid phase extraction and method for purifying samples prior to analysis A solid phase extraction (SPE) device having a reservoir with an opening; a well comprising an internally tapered wall, the well having a wider interior diameter at an end closest to the opening than at an exit spout; a first filter within the well; a bed of sorbent... | 03/20/2007 |
| 7189964 | System and method for isotopic signature and mass analysis Mass intensity values, isotopic ratios and exact mass differences between isotopes may be obtained and analyzed to determine if there are one or more masses of interest. In one implementation, a method will look among the mass intensity values for peaks of interest.... | 03/13/2007 |
| 7186336 | Flow sensing apparatus A method and apparatus for monitoring and controlling the nano-scale flow rate of fluid in the operating flow path of a HPLC system. A first flow sensor is disposed in a first flow path between a first flow-divider and a fluidic tee. A second flow sensor is disposed... | 03/06/2007 |
| 7175913 | Porous hybrid particles with organic groups removed from the surface A material for chromatographic separations, processes for its preparation, and separation devices containing the chromatographic material. In particular, porous inorganic/organic hybrid materials are provided with a decreased concentration of surface organic groups.... | 02/13/2007 |
| 7168299 | Heat spreader for rotary rheometer A rotary rheometer having a an upper heating/cooling assembly and a lower heating/cooling assembly located opposite one another opposite a sample gap. The lower heating/cooling assembly may comprise a Peltier heater and the upper heating/cooling assembly preferably ... | 01/30/2007 |
| 7137290 | Rotary rheometer magnetic bearing A rotary rheometer having a magnetic thrust bearing. The thrust disk of the magnetic thrust bearing being situated between a pair of magnetic actuator assemblies and extending beyond the circumference of the actuator assemblies so as to encompass the magnetic flux l... | 11/21/2006 |
| 7135874 | System and method for enhanced measurement of rheological properties A sensor for measurement of small-angle or small-displacement position of a rotational rheometer incorporates multiple independent capacitors in a symmetric relationship. The device presents its output as a standard bridge configured differential signal, which can b... | 11/14/2006 |
| 7087897 | Mass spectrometer A mass spectrometer is disclosed comprising an electric field region L2 wherein a time-varying electric field is applied thereto. In a mode of operation a pulse of ions 3 comprising ions having different mass to charge ratios passes through the ele... | 08/08/2006 |
| 7086279 | Fraction collector for composition analysis A method and apparatus for controlling fraction collection in an eluent stream flowing from an LC column. A triggering detector recognizes the presence of a target substance according to characteristics of chromatographic peaks in the eluent stream and initiates a d... | 08/08/2006 |
| 7075317 | System and method for measurement of small-angle or small-displacement A sensor for measurement of small-angle or small-displacement position incorporates multiple independent capacitors in a symmetric relationship. The device presents its output as a standard bridge configured differential signal, which can be interpreted and measured... | 07/11/2006 |
| 7059185 | System and method of measuring convection induced impedance gradients to determine liquid flow rates A method and system for measuring the flow rate of a liquid or gas within a flow channel utilizing a centrally located excitation source and a plurality of sensors. The excitation source is comprised of a heating element coupled with an alternating current generator... | 06/13/2006 |
| 7052611 | Device for solid phase extraction and method for purifying samples prior to analysis A solid phase extraction (SPE) device having a reservoir with an opening; a well comprising an internally tapered wall, the well having a wider interior diameter at an end closest to the opening than at an exit spout; a first filter within the well; a bed of sorbent... | 05/30/2006 |
| 7053366 | Desalting plate for MALDI mass spectrometry A novel Matrix-Assisted Laser Desorption/Ionization Mass Spectrometry (MALDI-MS) desalting sample support plate is described. The plate comprises a sample presentation surface, wherein the sample presentation surface comprises at least one receiving surface of an ab... | 05/30/2006 |
| 7048435 | Humidity-controlled chamber for a thermogravimetric instrument Embodiments of the present invention relate to apparatus, systems and methods for adding a humidity-controlled system to a thermogravimetric instrument. A humidity-controlled chamber incorporates a housing, a humidifier, a sample chamber, a reference chamber, Peltie... | 05/23/2006 |
| 7025497 | Differential scanning calorimeter accounting for heat leakage A method and system for calculating a heat flow to a sample in a differential scanning calorimeter (DSC). The DSC has a sensor within an enclosure comprising an absolute temperature measurement detector for measuring the temperature of a base position on the sensor,... | 04/11/2006 |
